Sanyo 2CR5 Lithium Battery, a 6V photo battery designed for cameras.
Voltage: 6 Volts.
Chemistry: Lithium-manganese dioxide.
Usage: Specifically designed for high-drain photographic equipment like digital cameras.
Status: Sanyo has been acquired by Panasonic, and this specific Sanyo-branded product has been discontinued, with Panasonic 2CR5 batteries serving as the replacement.